Po Jun (破军)

The star of breaking — dismantling what exists so something else can be built. Po Jun carries the reading of rupture and renewal: the force that takes a structure apart. It is associated with reform, with starting over, and with the disruption that precedes both.

The fourteen major stars are not ranked as simply good or bad. The star of breaking — dismantling what exists so something else can be built. Brightness (庙旺利陷) and the stars it sits with change the reading more than the star's name does. Po Jun is the star the classical sources are most ambivalent about: it is simultaneously described as destruction and as the only major star that guarantees change will happen at all.

Assigned to 癸水 (yin water), Po Jun is described as water that breaks a dam. The classical reading treats it as the most destabilising of the fourteen and, in the same texts, as the necessary one — nothing in the system is rebuilt without it. It is grouped under Water (水) in the five-element system.